M1.9 earthquake 1km S of Irwindale, CA

Magnitude

1.9 (ML, local (Richter)), micro

Magnitude from

Southern California Seismic Network

Local time

Wed, May 11, 1983, 8:00 AM PDT

UTC

1983-05-11 15:00:24 UTC

Depth

6.5 km (4.1 mi), shallow

Epicenter

34.099° N, 117.935° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 1.8 km in depth

Magnitude uncertainty

±0.39

Depth from

From location

Station coverage gap

76°

Stations used

24

• Irwindale, CaliforniaPopulation 1,437. Forecast1 kmS
• Baldwin Park, CaliforniaPopulation 77,071. Forecast3 kmENE
• West Covina, CaliforniaPopulation 108,484. Forecast3 kmN
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast29 kmE

After

1. 2.34km NNE of Moreno Valley, CAWed, May 11, 10:07 AM PDT · 15852 days ago · 7 km deep · 68 km away
2. 2.02km N of Moreno Valley, CAWed, May 11, 10:07 AM PDT · 15852 days ago · 12 km deep · 68 km away
3. 2.911km W of Lytle Creek, CAWed, May 11, 11:30 PM PDT · 15852 days ago · 3 km deep · 34 km away
4. 1.52km SSW of Devore, CASat, May 14, 7:32 AM PDT · 15849 days ago · 4 km deep · 50 km away
5. 1.62km SSW of Devore, CASat, May 14, 8:38 AM PDT · 15849 days ago · 3 km deep · 50 km away
6. 2.78km E of Yucaipa, CASat, May 14, 10:41 PM PDT · 15849 days ago · 10 km deep · 91 km away
7. 2.04km SW of Signal Hill, CAMon, May 16, 9:27 AM PDT · 15847 days ago · 2 km deep · 43 km away
8. 1.81km S of Loma Linda, CATue, May 17, 3:24 PM PDT · 15846 days ago · 17 km deep · 62 km away
9. 1.58km NNE of Lake View Terrace, CAWed, May 18, 5:06 PM PDT · 15845 days ago · 6 km deep · 45 km away
10. 1.57km WSW of Big Bear Lake, CAThu, May 19, 1:34 AM PDT · 15845 days ago · 8 km deep · 89 km away
11. 1.59km ENE of Yucaipa, CAThu, May 19, 4:45 PM PDT · 15844 days ago · 15 km deep · 90 km away
12. 1.58km ESE of Santa Clarita, CAFri, May 20, 11:55 PM PDT · 15843 days ago · 7 km deep · 55 km away
13. 2.82km NW of Fontana, CASat, May 21, 10:44 AM PDT · 15842 days ago · 4 km deep · 42 km away
14. 2.22km NNW of Fontana, CASat, May 21, 11:58 AM PDT · 15842 days ago · 3 km deep · 43 km away
15. 1.67km NW of Lytle Creek, CASat, May 21, 5:16 PM PDT · 15842 days ago · 7 km deep · 41 km away
16. 1.51km ENE of Beaumont, CASat, May 21, 10:58 PM PDT · 15842 days ago · 13 km deep · 92 km away
17. 2.18km ESE of Santa Clarita, CASun, May 22, 3:28 AM PDT · 15841 days ago · 6 km deep · 55 km away
18. 1.87km W of Huntington Beach, CAMon, May 23, 2:49 AM PDT · 15841 days ago · 5 km deep · 48 km away
19. 2.00km N of Loma Linda, CAMon, May 23, 10:39 AM PDT · 15840 days ago · 15 km deep · 62 km away
20. 1.76km SW of Banning, CAMon, May 23, 2:24 PM PDT · 15840 days ago · 11 km deep · 97 km away
21. 1.76km NE of Moreno Valley, CATue, May 24, 9:33 AM PDT · 15839 days ago · 15 km deep · 71 km away
22. 1.77km E of Running Springs, CATue, May 24, 3:56 PM PDT · 15839 days ago · 7 km deep · 84 km away
23. 2.21km SSE of San Jacinto, CAWed, May 25, 5:36 PM PDT · 15838 days ago · 12 km deep · 97 km away
24. 1.54km N of Moreno Valley, CAWed, May 25, 7:10 PM PDT · 15838 days ago · 12 km deep · 68 km away
25. 1.51km NNW of Loma Linda, CAWed, May 25, 10:11 PM PDT · 15838 days ago · 8 km deep · 62 km away
26. 2.313km NNE of Running Springs, CAThu, May 26, 11:35 AM PDT · 15837 days ago · 3 km deep · 85 km away
27. 1.53km SSW of Mentone, CAFri, May 27, 4:06 PM PDT · 15836 days ago · 13 km deep · 72 km away
28. 2.35km SE of Loma Linda, CASat, May 28, 7:08 AM PDT · 15835 days ago · 13 km deep · 66 km away
29. 1.85km ESE of Malibu, CASun, May 29, 9:37 AM PDT · 15834 days ago · 12 km deep · 77 km away
30. 1.62km NNW of Moreno Valley, CAMon, May 30, 10:21 AM PDT · 15833 days ago · 10 km deep · 67 km away
31. 1.517km W of Malibu, CATue, May 31, 7:30 PM PDT · 15832 days ago · 15 km deep · 98 km away
32. 2.59km NNE of Beaumont, CAWed, Jun 1, 1:39 AM PDT · 15832 days ago · 5 km deep · 91 km away
33. 2.25km N of Upland, CAWed, Jun 1, 9:26 PM PDT · 15831 days ago · 14 km deep · 27 km away
34. 1.613km SSW of Big Bear Lake, CAThu, Jun 2, 8:28 PM PDT · 15830 days ago · 5 km deep · 89 km away
35. 2.13km NNE of Cerritos, CASun, Jun 5, 1:32 AM PDT · 15828 days ago · 7 km deep · 26 km away
36. 1.83km SW of La Mirada, CAMon, Jun 6, 1:32 AM PDT · 15827 days ago · 4 km deep · 24 km away
37. 1.67km SSW of Littlerock, CAMon, Jun 6, 8:41 AM PDT · 15826 days ago · 8 km deep · 41 km away
38. 2.210km WSW of Corona, CAThu, Jun 9, 9:09 AM PDT · 15823 days ago · 5 km deep · 37 km away
39. 1.95km N of Banning, CAThu, Jun 9, 3:30 PM PDT · 15823 days ago · 15 km deep · 98 km away
40. 1.56km NNW of Fillmore, CAThu, Jun 9, 6:20 PM PDT · 15823 days ago · 1 km deep · 100 km away
41. 2.53km ESE of Hawthorne, CAFri, Jun 10, 1:57 AM PDT · 15823 days ago · 13 km deep · 42 km away
42. 2.15km SE of Loma Linda, CAFri, Jun 10, 7:58 AM PDT · 15822 days ago · 13 km deep · 66 km away
43. 1.54km NNE of Fontana, CAFri, Jun 10, 4:51 PM PDT · 15822 days ago · 5 km deep · 46 km away
44. 1.69km E of Running Springs, CASun, Jun 12, 7:43 PM PDT · 15820 days ago · 4 km deep · 86 km away
45. 2.013km SSW of Rancho Palos Verdes, CAMon, Jun 13, 12:23 AM PDT · 15820 days ago · 4 km deep · 70 km away
46. 2.022km SW of Laguna Beach, CAMon, Jun 13, 7:55 AM PDT · 15819 days ago · 6 km deep · 77 km away
47. 2.419km SW of Laguna Beach, CAMon, Jun 13, 7:58 AM PDT · 15819 days ago · 6 km deep · 74 km away
48. 1.80km NNW of Silver Lake, CAMon, Jun 13, 9:12 AM PDT · 15819 days ago · 11 km deep · 30 km away
49. 1.88km NNE of Chatsworth, CAMon, Jun 13, 9:50 PM PDT · 15819 days ago · 12 km deep · 64 km away
50. 2.512km NW of Malibu, CATue, Jun 14, 5:39 AM PDT · 15818 days ago · 14 km deep · 90 km away
51. 1.61km ENE of Muscoy, CATue, Jun 14, 8:44 PM PDT · 15818 days ago · 9 km deep · 56 km away
52. 2.98km ENE of Santa Clarita, CASun, Jun 19, 3:45 AM PDT · 15813 days ago · 4 km deep · 59 km away
53. 1.86km SW of Devore, CAMon, Jun 20, 11:06 PM PDT · 15812 days ago · 11 km deep · 46 km away
54. 1.616km WSW of Dana Point, CATue, Jun 21, 1:31 AM PDT · 15812 days ago · 5 km deep · 79 km away
55. 1.910km NNE of Castaic, CAThu, Jun 23, 1:42 AM PDT · 15810 days ago · 21 km deep · 78 km away
56. 2.85km N of San Bernardino, CAThu, Jun 23, 6:52 PM PDT · 15809 days ago · 6 km deep · 60 km away
57. 2.02km ESE of Long Beach, CAThu, Jun 23, 9:05 PM PDT · 15809 days ago · -1 km deep · 38 km away
58. 2.43km SE of Loma Linda, CASat, Jun 25, 2:21 AM PDT · 15808 days ago · 14 km deep · 65 km away
59. 1.86km NNE of Moreno Valley, CASat, Jun 25, 6:11 AM PDT · 15807 days ago · 5 km deep · 69 km away
60. 1.63km SE of Loma Linda, CASat, Jun 25, 4:15 PM PDT · 15807 days ago · 14 km deep · 65 km away

The first 60 of 76.

Before

1. 2.34km NNE of Fontana, CATue, May 10, 6:22 PM PDT · 15853 days ago · 4 km deep · 45 km away
2. 2.32km NW of Beaumont, CASat, May 7, 6:37 PM PDT · 15856 days ago · 13 km deep · 88 km away
3. 3.32km WNW of Beaumont, CASat, May 7, 5:05 PM PDT · 15856 days ago · 19 km deep · 88 km away
4. 1.52km E of Huntington Beach, CAFri, May 6, 5:05 PM PDT · 15857 days ago · 5 km deep · 45 km away
5. 1.712km SSW of Big Bear Lake, CAFri, May 6, 4:33 AM PDT · 15857 days ago · 4 km deep · 89 km away
6. 2.119km WSW of Rancho Palos Verdes, CAThu, May 5, 2:23 PM PDT · 15858 days ago · 3 km deep · 75 km away
7. 1.61km SSE of San Jacinto, CAWed, May 4, 10:25 AM PDT · 15859 days ago · 12 km deep · 98 km away
8. 1.53km SSW of Valencia, CAWed, May 4, 9:49 AM PDT · 15859 days ago · 3 km deep · 70 km away
9. 1.92km SE of Hollywood, CATue, May 3, 9:27 PM PDT · 15860 days ago · 9 km deep · 35 km away
10. 2.21km ESE of Inglewood, CATue, May 3, 5:07 PM PDT · 15860 days ago · 13 km deep · 41 km away
11. 2.012km NNE of Yucaipa, CATue, May 3, 11:48 AM PDT · 15860 days ago · 9 km deep · 88 km away
12. 1.711km NNE of Yucaipa, CATue, May 3, 11:38 AM PDT · 15860 days ago · 9 km deep · 88 km away
13. 1.88km WSW of Hermosa Beach, CATue, May 3, 3:21 AM PDT · 15861 days ago · 6 km deep · 58 km away
14. 1.64km WNW of Banning, CATue, May 3, 12:05 AM PDT · 15861 days ago · 16 km deep · 95 km away
15. 2.523km NE of Avalon, CATue, May 3, 12:04 AM PDT · 15861 days ago · 2 km deep · 72 km away
16. 2.122km ENE of Avalon, CAMon, May 2, 8:04 PM PDT · 15861 days ago · 6 km deep · 76 km away
17. 2.56km ESE of Yucaipa, CAMon, May 2, 3:24 PM PDT · 15861 days ago · 14 km deep · 89 km away
18. 2.029km SSW of Dana Point, CAMon, May 2, 2:35 PM PDT · 15861 days ago · 6 km deep · 96 km away
19. 1.820km SW of Newport Beach, CASun, May 1, 10:00 PM PDT · 15862 days ago · 6 km deep · 70 km away
20. 2.26km SE of Malibu, CASun, May 1, 9:14 AM PDT · 15862 days ago · 12 km deep · 77 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci1107401. Read Sun, Oct 4, 2026, 9:51 PM UTC.